Step 1 ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Make sure to remove all the packing material in the following areas: - Inside the printer
- Toner cartridges and imaging unit
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Print the document.
Do the defects still appear? | Go to step 2. | The problem is solved. |
Step 2 Determine how many colors have defects. Is only one color affected? | Go to step 3. | Go to step 3. |
Step 3 ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Using the Maintenance Defect Ruler, measure the distance between the repeating defects on the affected color page. ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Replace the supply item that matches the measurement on the affected color page. Color imaging kit or black imaging unit - 94.5
mm (3.72
in.)
- 29.9
mm (1.18
in.)
- 23.2
mm (0.91
in.)
Developer unit - 43.6
mm (1.72
in.)
- 45.0
mm (1.77
in.)
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Print the Print Quality Test Pages.
Do the defects still appear? | Take note of the distance, and then contact customer support or your service representative. | The problem is solved. |
Step 4 ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Using the Maintenance Defect Ruler, measure the distance between the repeating defects on the affected color page. ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Replace the supply item that matches the measurement on the affected color page. Transfer module - 37.7
mm (1.48
in.)
- 78.5
mm (3.09
in.)
- 54.6
mm (2.15
in.)
Fuser - 95
mm (3.74
in.)
- 110
mm (4.33
in.)
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Print the Print Quality Test Pages.
Do the defects still appear? | Take note of the distance, and then contact customer support or your service representative. | The problem is solved. |